However, after the first round (first time interval), the algorithm will gradually allocate the remaining bandwidth to greedy applications.
The system allocates processor time to active apps and cuts off greedy applications after running an alloted number of compiled lines of code to pevent abuse.
In addition, some users may use greedy applications such as video streaming, which may prevent other applications from connecting to the Internet.
With this imbalance communication problem, it is apparent that greedy applications such as multimedia streaming applications can essentially starve the wireless network.
Second, our fair bandwidth allocation mechanism can alleviate the problems of greedy applications, unwanted traffic from virus-infected hosts and DoS/DDoS wireless attackers.
In general, the bandwidth may not be equally shared among users in the same WLAN, because some users may utilize greedy applications that consume much larger bandwidth and consequently prevent other applications from connecting to the Internet.
In "Achievable throughput-based MAC layer handoff in IEEE 802.11 wireless local area networks", Seo et al. propose a Media Access Control MACC) layer handoff mechanism for IEEE 802.11 wireless local area networks to improve the performance of bandwidth greedy applications.
Other than greedy applications, virus-infected hosts, and DoS/DDoS traffic, the distributed coordination function (DCF) mechanism [1], which is the mandatory media access control method in the 802.11 MAC protocol, also contributes to the unfair access problem among wireless stations.
We propose a MAC layer handoff mechanism for IEEE 802.11 Wireless Local Area Networks (WLAN) to give benefit to bandwidth-greedy applications at STAs.
In this sense, using the RSSI as a handoff criterion in the conventional MAC layer handoff mechanism is not good enough to give more benefit to bandwidth-greedy applications (such as FTP, P2P file sharing, and e-mail) which require bandwidth as high as possible.
Replying to quality of service requirement with always greedy data application is still an important challenge for wireless cellular networks.
